Ключевые слова: adolescence, african american, ask, audience, back to school, business, classroom, company, conference, convention, corporate, crowd, discussion, diverse, education, employee, event, females, friendship, group, high school, horizontal, indoors, intelligence, job, learning, lecture, listen, males, meeting, men, office, people, presentation, professional, public, raise, seminar, smile, speech, staff, student, studying, team, teenager, training, university, up, women, young,